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Inventor
CHU RENYUAN
CN
2 patents
Patents
2 patents
US10694937B2
Jun 30, 2020
Hand-held autonomous visual acuity measurement apparatus and visual acuity measuring method
SUZHOU SEEHITECH EQUIPMENTS CO LTD
0 citations
25
US10478062B2
Nov 19, 2019
Optometry apparatus capable of measuring para-central defocus
SUZHOU SEEHITECH EQUIPMENTS CO LTD
0 citations
25